The Sentry Contact Sensor monitors every entry point in your home, notifying you the instant a door or window opens unexpectedly. Its discreet design and reliable wireless connection make it an essential part of any smart security setup. Instant alerts to your phone when doors or windows open or close Compact, tool-free installation with included adhesive — no drilling required Integrates with smart home automations to trigger lights, locks, or alarms Monitor multiple sensors from a single app with real-time status dashboard What customers say about smart sensorsSelected from verified buyer reviews of comparable WiFi smart sensors. “These have been a great way for me to know when my father that has dementia attempts to leave the house that my cameras don't cover yet I'll will be purchasing another set to cover the last two doors of my house this way all the bases are covered.” — T. Andrews, Verified Buyer “Great for alerting when our toddler would open his door during the night. He can get past locks and child door knob covers with ease.” — M. Wilson, Verified Buyer “works great. we use this product for our shop to let us know when we receive deliveries in thru the back door as well as when we get customers in the front.” — T. Harris, Verified Buyer “Works great! Comes with 2 door sensors so it was perfect for the two doors on my patio.” — M. Carter, Verified Buyer “i bought this door sensor for the safety of my child. with this tool, i am able to hear if she goes outside.” — S. Mitchell, Verified Buyer Satisfaction Guarantee: Not satisfied? Return your order within 30 days for a full refund. Contact [email protected] and we will take care of it.
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